The Milton Twins were pretty popular recently, though I always thought their sexual performances were rather lackluster, and I don't think they ever did anything other than kiss one another (though they'd go down on a cock that had been in the other's cunt/ass).

It's rare but if you look around hard enough and long enough to sort through the BS you will occasionally find something that is undeniable. I have seen a hand full of real incest material where the family resemblance is undeniable and it is fucking hot.

You can click on the individual pages for a couple of small sample pics that are actually stills from the vids. I think they usually load onto Windows Media - at least they do on my computer. I've never had a problem with any adverse affects from these, either.